Operation - Honeywell Modutrol IV M934D Product Data

SERIES 90 MODUTROL IV™ MOTORS

OPERATION

Use Series 90 Modutrol IV Motors for standard Series 90
operation (see Table 7):
1. Two potentiometers, one in the controller and one in the
motor, along with the motor resistor network, form a
bridge circuit. As long as the value of the controlled
medium remains at the setpoint, the circuit remains
balanced and the motor does not run.
2. When the controlled medium value changes, the
controller potentiometer wiper moves, unbalancing the
bridge circuit.
3. The imbalance is amplified and the microcontroller then
drives the motor in the direction necessary to correct the
controlled medium change.
4. As the motor shaft rotates, it turns the feedback
potentiometer, rebalancing the bridge circuit, stopping
the motor.
Table 7. Modutrol IV Motor Operation.
Motor Type
Non-Spring Return Open W and short
or Spring Return R to B
Open B and short
R to W
Jumper R-W-B
None
Non-Spring Return Power Loss
Spring Return Power Loss
63-2631
Signal Resulting Action
drives open
drives closed
drives to midstroke
drives closed
stops (none)
spring returns
(closed)
Fig. 10. Attaching a shunt resistor to TRADELINE motors.
Table 8. Cam Arrangements.
Motor
M9164D1009, M9174D1007
M9175D1014
M9172W1004
ALL OTHER M9164, M9172, M9175 Blue
M9161, M9171
M9184, M9194
M9185, M9186
M9484, M9494
All Other M9174
10
M17626
Inner Outer
Cam Cam
Red Blue
Red Red
Red
Blue Blue